think neither teams are going all-in the first leg of this round. arsenal needs a win more than barca, but barcelona has the advantage of the open style they're playing. if the arsenal midfielders can press fast and hard enough, the attacks are going to stall and also the other way around. so the strikers will be cutoff. i think this will happen pretty often, the pace of the match will not be as high as we used to be, and finally barca will take this one 0-1, but i can see a 1-1, 1-2 finish in this one. thats why im playing the under 3 for some insurance.